Friction-gearing.



G. RBNNBRFELT.

FRICTION GEARING.

APPLICATION FILED AUG. 4, 1909.

Patented Feb. 20, 1912.

wig/game tened to one end of UNITED STATES PATENT OFF1CE.

' GUSTAF RENNERFELT, OF NEW YORK, N. Y.

FnIoTIoN-eEAaINe.

To all whom it may concern:

Be it known that I,'GUs'rAr RENNERFEL'r, a subject ofthe King of Sweden, and a resident of the city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Friction-Gearing, of which the following is a specification.

My invention relates to improvements in friction gearing, and its object is to make such gearing more applicable and better adapted to certain purposes and certain types of machinery than has heretofore been the case, and also to make it of higher efliciency' and so that it may be reliable in operation and cheap in construction.

I will describe my invention in the following specification and point out the novel features thereof in claims.

Referring to the drawing Figure 1 is a sectional side elevation of an electric motor equipped with a friction gearing constructed according to my invention. Fig. 2 is a sectional plan View, the section being taken on the line XX.of Fig. 1. Fig. 3 is a sectional plan view, the section being taken on the line Y-Y of Fig. 1. Fig. 4 is a sectional view of a detail referred to in the specification as a roller. 'Fig. 5 is a plan view of a detail. Fig. 6 is a detail sectionalview of the roller, and the pagt'o f the machinery to which the roller is Jed. Fig. 7 is' a sectional side view sim lar to Fig. 1, but illustrating a modification of the invention.

Like characters of reference designate'corresponding parts in allof the figures.

2 designates the shaftmf the motor arranged to transmit rotary -motion at reduced speed tothe shaft 3, which is journaled in a bearing 4 fastened to the frame of the motor."

5 designates a yoke fastened to the shaft 3; and 6, 6 desi ate a plurality, preferably three, ofvlstuds astened to the yoke. I

7, 7 designate'spherical rollers mounted loosely one upon eachstud, and 8 designates a washer held on each. stud outside of the rollers Y Y 9 designates abeveled track, stationary in] relation to the frame designates a beveled of the motor, and 1 wheel or bushing fasthe motor shaft. The track beveled to the same angle as the bevel of the wheel, so that the 516.9 of the track 9 is parallel to the sideof th; wheel Specification of Letters Patent.

rollers, hard material, such as hardened steel or the like; the size of the aforesaid angle is such that it is substantially more-than twice the angle of repose for said materials. A shield Patented Feb. 20, 1912.

Application filed August 4, 1909. Serial No. 511,099.

the track and the wheel are neade of 11 is located between the wheel and the parts proper of the motor, adapted to contain a lubricant is formed for the wheel and the rollers. The studs 6 are hollow, and each is provided with a hole on its side shown in dotted lines .in Fig. 1 and so that a chamber more clearly at 12 in Fig. 7. -A wick 14 is shown in Fig. 7 for the purpose of conveying oil into the stud; In Figs. 1 and 6 the stud is shown as provided with a .nozzle 15 for the same purpose. The nozzle is directed in the direction of rotation of the roller 7 around the center lme of. the shaft 3 as indicated by the arrow 1n Fig. 6. During the operation of the apparatus the pressure of the oil against the rotating nozzle will cause some. amount of oil to flow through the hollow stud and the hole 12, so that the contact surface between the stud and the center of the roller will become lubricated.

The other end of the motor shaft is mounted in a roller bearing arranged to sustain both radial and axial pressure and com- I prising a beveled track or race 16 mounted on the shaft, abeveled race 17 mounted in the motor frame so that it can slide in axial a direction, and a plurality, preferably four,

the two races'16 and 17. Each roller 18 is loosely mounted on a stud 19 which is secured to the flat rings 20, located at opposite ends vof the rollers.

spring 21 is placed between the racev 17 and the plate 22,. its pressure being transmitted through the' rollers 18, through the shaft 2,

' bushing 10 and rollers 7 to track 9. A shield 23 serves to protect this roller hearing from dust. A force applied to the spherical surface of a roller 18, whether such force is due to axial or radial pressure from the trally directed force from the race 17 'so that the roller 18 will'have no tendency-to 0 tilt. T is is also the case with the spherical V roller 7 which like-the roller 18 constitutes 1 the middle section of a sphere. The pressures applied to the roller 7 from thetrack of spherical rollers 18 interposed between A strong spiral 7i shaft 2, will be directed through the center of the roller and will be balanced bya cennor crowded axially along its stud 6, and no part of the pressure from the spring 21 will be transmitted to the shaft 3.

The angle of bevel B of track 9 and bushing 10 is greater than twice the angle of repose, so that if the pressure exerted by the rollers 7 on the bushinglO becomes alonormally great, due to inaccurate workmanship or the presence of dust, the bushing 10 together with shaft 2 and the aforesaid rollerbearing may recede against the action of the spring, and the abnormally excessive pressure on the bushing 10 will be relieved.

The rotary motion of the secondary shaft 3 may be transmitted in any preferred manner. A chuck 24 adapted to hold a drill (not shown) may be. used, and the axial pressure on shaft 3 is then sustained on the rollerbearing 25 contained within the lati ral bearing 4, and shown in plan view in The modification illustrated in Fig. 7

' shows the bushing 10 of spherical form, the

angle ofthe bevel of the track 9 is greater than in Fig. 1, the shaft 3 is provided with a coupling 26, and the bearing 25 is arranged to sustain pressurein a downward direction.

What I claim is:

1. The combination of a beveled bushing, same angle as the bushing, a plurality of spherical rollers between the bushing and the track, means for rotating the bushing, and means connected to the rollers for transmitting the rotation;

2. The combination of a bushing, a track, a plurality of rollers having convex rolling faces between the bushing and the track, the side .of the track being parallel to the side of the bushing, bushing, and means for transmitting the rotation.

3. The combination of a shaft, a plural- I ity of studs supported by the shaft, a spherical roller mounted on each stud, a track in contact with the rollers, a bushing in contact with the rollers, the side of the track being parallel to the side of the bushing,

1 means for ressing the bushingagainst the rollers, an means for rotating the bushing. 4. The combination of a bushing, a track,

a plurality of rollers having spherical faces,

between the bushing and the track, yieldin means for subjecting the rollers to balanc pressure between the bushing and the track, a frame surrounding the track, a shaft journaled in the frame and 'connection.bet'weenthe rollers and the shaft.

5. The vcombination of a shaft, a beveled bushing at one end thereof, a beveled track, a plurality-of convex rollers between the bushing and the track, means for pressing the bushing against the rollers, a beveled race on the other end-of the shaft, a beveled race concentric with the first race, a plumeans for rotating the I connected to the rollers rality of spherical rollers between the two races, means for rotating the shaft, and means connected to the first said plurality of rollers for transmitting the rotation.

6. The combination of a frame, a shaft, a thrust bearing at one end of the shaft arranged to slide in the frame, a spring between said bearing and the frame, a beveled bushing at the other end of the shaft, a beveled track, a plurality of spherical rollers between the bushing and the track, means for rotating the shaft, and means connected to the rollers for transmitting the rotation.

'7. The combination of a shaft, a bushing thereon, a track, a plurality of rollers having spherical faces between the bushing and the track, means for applying power to the shaft, a second shaft, and means for trans mitting power from the rollers to said sec-' ond shaft.

8. The combination of a shaft, a plurali ity of studs supported from the shaft, a

spherical roller mounted loosely on each .stud, the stud being hollow and formed. with,

a nozzle arranged to convey lubricant to the contact between the stud and the roller, a beveled bushing and a beveled track in contact with the rollers, and means for rotating the bushing.

9. The combination of a shaft, a plurality of hollow studs supported therefrom, a spherical roller mounted loosely on each stud, abeveled bushing and a beveled track in contact with the rollers, means for conveying oil into the studs, and means for rotating the bushing.

10. The combination of a frame, a. shaft, a beveled race mounted on one end ofthe shaft, a beveled race' arranged to slide in the frame, a sprin .between said race and theframe, a plura ity of s herical rollers between the races, a beveled ushing mounted on the other'end 'of the-shaft, a beveled track, a plurality of s herical rollers between the bushing and the track, means for rotatingthe shaft, and said latter rollers for transmitting the rotation.

11. The combination of a shaft, a beveled bushing on one end of the shaft, 9. track, a plurality "of rollers having convex means connected to rolling faces between the bushing andthe track, means for pressing the bushing against the rollers, a fraine surrounding the track, a second shaft j ournaled in the frame, and connection between the rollers and the second shaft.

12. The combination of a shaft, a beveled race mounted on, each end ofthe shaft, :1; track aroundeach of the races, a set of rollers having convex rolling faces arranged between'each race and its track, a

frame, and a spzingbetween' the frame and one of the tree 13. The combination of a shaft, a beveled race mounted on each end of the'shaft, a track around each of the races, a set of rollers having convex rolling faces arranged be tween each race and its track, a frame, a spring between the frame and one of the tracks, a second shaft, and connection between said shaft and one set of the rollers.

14. The combination of a shaft, a beveled bushing thereon, a track, a plurality of rollers having spherical rolling faces arranged between the bushing and the track with their axis at an angle to the shaft, a beveled race on the shaft, a second race, and a plurality of spherical rollers between the two races.

15. The combination of a shaft, a beveled bushing thereon, a track, a plurality of rollers having spherical rolling faces between the bushing and the track, the diameter of a roller being greater than its length, a beveled race on the shaft, a second race, and a plurality of spherical rollers between the races.

Signed at New York in the county of New-York and State of New York this 31st day of July A. DQ 1909. GUSTAF RENNERFELT.

Witnesses:

CLARENCE W. SENIOR, ALQDT. SYLVIN. 

